You are ignoring the concrete around the columns, the concrete in the columns in the core, and other essentials.

OIC.

You believe that the core columns were encased concrete, and not gypsum and SFRM.

LMAO....

You have nothing but guesses for those figures, and frankly I'm a little tired of you asserting that your red herrings actually make one IOTA
of difference to the topic of discussion.

It was your assertion that all the concrete was vaporized, and since it is 3/4 of the weight in the towers, there is a lack of mas to drive the
gravity collapse.

I am correcting your mistake so that others can learn from them.

But I AM objecting, because you do not posses all of the facts, and this is clear, because you are merely guessing about your calculations on
the amount of concrete per floor, your calculations are childish in the extreme, and you are presenting them as FACT.

Sorry for making such childish calcs then.

But since we know the floor arteas, and the concrete weights, then you surely show us all your math eloquence and provide a stunningly beautiful calc
that shows me up?

The jews placed the charges
The US government covered all the bases
The Arabs supplied the flight crews
The bush family plotted with the binladens to perpetrate the assault
And we the people got screwed

The loss of the concrete mass from the collapsing twin towers affects its kinetic energy, which reduces the energy of the collapse.

And I agree with that.

It's just that we disagree on how much was there in the first place, and how much was ejected.

I say that there was only 169,000 mt in the towers, and provided calcs and my reasoning. I also provided a scholarly paper, that references other
papers and reports that support the notion that only 1/3 of the concrete was ejecxted during the collapse progression.

You have provided a number on the TOTAL amount of cocncrete used in the construction of the WTC complex, but zero breakdown on how much is in the
floors. Nor have you provided anything on there being concrete in the cores, etc, which is probably a good thing since even the most delusional here
have given up on that lunacy. Nor have you produced any rteports that back your claim that supports the notion that 100% of the concrete was vaporized
and ejected during the collapse.....

And looking back, I see that I have responded to each and Every one of your points

Wrong. I asked what you think vaporized the concrete? No definitive answer yet.... Only dodging...

Originally posted by ErtaiNaGia
And since most all of the concrete was turned to dust, that is a substantial figure indeed.

The only concrete in the buildings were in the floors. The concrete averaged 4" thick and was sandwiched between a layer of corrugated steel and a
layer of carpet or vinyl flooring.

The sheet rock did probably probably a large contributor to the dust, but the largest contributor was probably the fire proofing.

All of the steel in the building was coated with fireproofing or gypsum board. The spray on fireproofing averaged over 1.5" and covered the underside
of the floors, the floor trusses, the core columns, the spandrel plates, and 3 sides of the exterior columns. The amount of area covered by
fireproofing greatly exceeded that of the concrete.

The fireproofing was also much less resilient than concrete it can easily be crushed into dust with your bare hand.

During the collapse as one floor impacted the next, it would knock the fireproofing off the bottom of the floor. Next the over-pressurised air in the
room would blow out the windows and the fast exiting air would carry the dust with it. This is what gave the impression of an explosion.

We know for a fact, that before the collapse, the steel was covered with fireproofing.

We know for a fact. that after the collapse, the steel was no longer covered with fireproofing.

Get the picture ?

The dust was mostly fireproofing. The white dust coming off of the core columns in spire videos is fire proofing dust.

If you don't know about the fireproofing, you should find out about it, before you spread your Truther Propaganda any further..

"The 10 cm thick concrete slabs were apparently a lightweight form of concrete typically used in high-rises. Its density and exact composition remain
unknown, but such lightweight concrete is typically 60% as dense as concrete used in roads and sidewalks. The floors were the only major part of these
mostly steel buildings that contained concrete. "

I have come in late to this "debate" but need to put in my two cents. I worked construction for over 20 years beginning when I was 17. I learned on
the job a lot about engineering and why things were constructed a certain way. I also not even constructed structures I also "decunstructed" or demo'd
buildings. Very huge warehouses and fuel storage containers.

What I would like to politely add to this discussion is somethings I have read from other posters.

Originally posted by ErtaiNaGia

I'd say most of it... Concrete does not readily vaporise, even when smashed between heavy objects.... it just fractures.

This is true only if once the pressure that causes it to fracture is released such as when a PSI test is done on a test pour sample from a
construction project.

But for the twin towers the pressure did not stop at point of fracture, it increased each and every time the top floor driven down by the force of the
upper floors impacted the stationary bottom floor held up by the remaining building.

Each and every time each floor impacted with the lower floors the pressure continued and increased.

The floors above it being carried down by the sheer weight of the tower as it was collapsing was still under enormous pressure which also increased as
that mass impacted with the lower floors.

Eventually the whole mass impacted with the sub-floors and then the ground.

All that energy created by that huge falling mass could not be absorbed by the ground so it when back the way it came.

UP.

For every action there HAS to be a reaction.

The floors above the impact areas did not collapse until they all "rode" the building to the ground.

This can be seen in the videos that are available.

The energy released back UP into what was now rubble.

That is except for the energy that went out into the ground area effectively destroying the subway line and a number of the underground areas nearby.

The floors, now collapsed and now under pressure for the weight of the entire building and its contents, then again received all that energy and
pressure again.

The facade of the towers, shown in the picture on somebody's post, was from the very top of the building and survived because there was nothing more
to impact on it.

It was left in the position as shown from the return of energy.

The floors were held or hung from the central core of the building which was corrugated industrial steel.

Like branches radiating out from the trunk of a tree.

The concrete that was applied as a fire suppressant and sound dampener did not have a very high PSI, probably no more than sidewalk concrete.

And yes, you can pulverize this type of concrete until it is powder.

It is done all the time with recycled concrete that is now used in asphalt products.

It is crushed,the metal inside is removed with magnets and it is used as sand and fines in asphalt.

Any concrete can be reduced to fine powder with a crusher unit if you continually run it through the machine.

The "puffs" always seen in the videos from each corner of the building as "proof" of the use of explosives is laughable.

The corners of the building did not carry the load of the structure.

The original design did not include those I beams at each corner and the structures could have been built with glass panes at the corners.

The designers decided against that because the workers inside would become easy without seeing something in the corners.

The I beams only reach from floor to ceiling and were only basically positioned on top of each other.

The "puffs" seen in the videos is the energy being transferred down at the corners through each I beam as the buildings collapsed.

The "puffs" is from concrete of each floor, top and bottom at the corners, being crush to powder by the I beam plates.

If it was a "controlled demolition" you would also see them in the upper, momentarily intact, floors above where the plane impacted.

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